Classification — Odd Numbers

Test
Materials

Q1: Find the odd one out in given series: 35 , 49 , 50 , 63 , 140

A. 35
B. 49
C. 50
D. 63
 Answer:  50. Each of the number except 50, is divisible by 7.
 

Q2: Find the odd one out in given series: 21 , 39 , 51 , 63 , 83 

A. 21
B. 39
C. 51
D. 83
 Answer: 83. This is the only prime number in the group.
 

Q3: Find the odd one out in given series: 27 , 125 , 343 , 729 , 1321

A. 27
B. 125
C. 343
D. 1321

 Answer: 1321. All other numbers are cubes of odd numbers.

 

Q4: Find the odd one out in given series: 45 , 99 , 109 , 126 , 207

A. 45
B. 99
C. 109
D. 126
 Answer:  109. Each of the numbers except 109, is divisible by 9.
 

Q5: Find the odd one out in given series: 6 , 12 , 18 , 9 , 7.

A. 6
B. 12
C. 18
D.  7
 Answer: 7. This is the only prime number in the group.

 

Q6: Find the odd one out in given series: 7359 , 1593 , 9175 , 3781 , 9317.

 

A. 7359

B. 1593

C. 9175

D. 3781

Answer: 3781. All other numbers consist of odd digits only.